So I have a 2000 honda accord v6, in the morning when the car is cold it turns on fine with no problem but once it warms up and when it's hot during the day after like a 30 min drive the car won't start so good, it'll start but it will die if I don't keep stepping on the gas pedal, engine lights comes on and go away whenever RPM will drop and car just die. It says Random misfire, I put new spark plug, new main relay box and a new fuels pressure regulator but it still still dies. It will start but it will shake and if I don't step on gas it will die. What is it? Any help? Thanks.

 

What are the actual codes you are getting? They start with the letter P and have four numbers, like P1234.

 

Sounds like the infamous vapor lock issue.

 

The code said P0300

 

I mean it's P0300